This is an incorrect statement. To be blunt, you are lying.
Not every block increase results in a loss of decentralization.
Maybe not, but in general, bigger blocks = require more resources = centralizing the network. It's simply physics, ser.
You also need to consider cost of the resource (such as storage in $/TB or internet speed in $/GB) usually going down over time. Although waiting time for IBD (initial block download) probably only become worse, especially if block size limit is increased and block remain mostly full.
maths has already been done
full node users are normally people that want to use bitcoin regularly and support the network
if you want to be a full noder. then the costs/day of a hard drive and internet are cheaper than the average tx of a next block confirm
so again to emphasise it. the tx fee is higher then "resource cost"
..
now here is the thing
just to use bitcoin. you do not NEED to be a full noder. you can simply get a seedkey. and start "stacking sats" onto your key by just copy and pasting an address for people/services to pay into.. where all you need is a keyboard
(in the most simplest use of bitcoin investing)
and just use a lite wallet when its time to get out. for those that just want to use bitcoin for long term investments
the more you WANT to be involved in bitcoin and use bitcoin. then you can use better software. but again..
the more you want to use bitcoin you find the fee's of that more frequent use that you prefer to protect with better levels of software.. its still the fee's that cost you more. not the hardware required to run it